Destroy(gameObject) not working

i cant destroy this object , the debug message is working and the powerup is spawned the array which stores de reference is being erased , as the explision ignores the rock after its exploded

 using UnityEngine;
 using System.Collections;
 
 public class Rock : MonoBehaviour {
     public GameObject powerUp;
     static Sprite []sprite;
     // Use this for initialization
     void Start () {
         if (sprite==null)
             sprite=Resources.LoadAll <Sprite>("Sprites/Rocks");
         int num =Random.Range(1,sprite.Length-1);
         transform.Find("Sprite").GetComponent<SpriteRenderer> ().sprite = sprite[num];
     }
     
     // Update is called once per frame
     void Update () {
     }    
     public void Explode()//<--- THAT LINE
     {
         Destroy(gameObject);
         Debug.Log("Exploded");
         if( powerUp!=null)
         {
             var pw=(GameObject)Instantiate(powerUp,transform.position,transform.rotation);
             int num=15;
             num=Random.Range(0,num);
             pw.GetComponent<PowerUp>().Init(num);
             
         }
     }
 }

this is the code that spawns the rock

 public void LoadMap(string name)
     {
         int type,depth=1;
         int i,j;
         string arena=INIWorker.IniReadValue("Arenas",mapName);
         if(arena!=null)
         {
             for(i=0;i<size;i++)
             {
                 for(j=0;j<size;j++)
                 {
                     type=int.Parse(arena.Substring(0,1));
                     //Debug.Log(" "+type);
                     if (type<materials.Length)
                     {
                         AllObjects[i,j]=(GameObject)Instantiate(materials[type],new Vector3(i+0f,j+0f,depth+0f),Quaternion.identity);
                     }
                     arena=arena.Substring(1,arena.Length-1);
                 }
             }
         }else Debug.Log(mapName+" nao encontrado");
     }

and this is the one the calls explode

 public void Check()
     {
         int x=(int)transform.position.x;
         int y=(int)transform.position.y;        
         if (MapLoader.CheckMapObject(x,y,"Rock"))
         {    Debug.Log(MapLoader.CheckMapObject(x,y,"Rock"));
             MapLoader.GetMapObject(x,y).transform.GetComponent<Rock>().Explode();
             Debug.Log(MapLoader.GetMapObject(x,y));
         }
         if (MapLoader.CheckMapObject(x,y,"Bomb"))
         {
             MapLoader.GetMapObject(x,y).transform.GetComponent<bomb>().Explode();
         }
             
     }